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Yekaterinburg, Russia

Povolotskii V.Y.,OAO VNIIMT | Lantsov Y.V.,OAO OEMK | Plotnikova S.Y.,OAO OEMK
Steel in Translation | Year: 2011

A model of direct iron production by pellet reduction in a shaft furnace has been developed. This model includes the material and energy balances of all the main components of the reduction system (shaft furnace, reformer, etc.) and is based on ARM Tekhnologa software for the analysis and optimization of the reduction conditions at OAO OEMK. The calculation results may be used in the reconstruction of the reduction system and implemented in practice. To predict the reduction conditions and control the direct production of iron, a determinate model of the heat and mass transfer and gas dynamics in the bed is added to ARM Tekhnologa software. This supplementary model simulates the reduction dynamics of a pellet in the shaft furnace and expands the scope for calculating new reduction conditions, so as to boost product output and quality. © 2011 Allerton Press, Inc. Source


Butkarev A.A.,OAO VNIIMT
Steel in Translation | Year: 2011

Improvements in the control of pellet heat treatment in conveyer roasting machines are considered. It is shown that the consumption of power and natural gas may be reduced, and the productivity may be increased, by means of various control subsystems, including optimal control of the process and parameter stabilization. © 2011 Allerton Press, Inc. Source


Samoilovich Y.A.,OAO VNIIMT
Steel in Translation | Year: 2015

A physicomathematical model is proposed for the thermal stress of steel rollers quenched after inductive heating. The model involves numerical solution of a system of interrelated nonlinear heat-conduction and thermoviscoelasticity equations. It takes account of the kinetics of austenite decomposition and the specifics of inductive heating. The validity of the model is confirmed by comparing the calculated stress in a roller (diameter 210 mm) with experimental data obtained by the Saks method. © 2015, Allerton Press, Inc. Source


Samoilovich Y.A.,OAO VNIIMT
Steel in Translation | Year: 2010

The removal of alumina particles from steel is considered for two configurations of a (90-100)-t intermediate ladle. Mass transfer is analyzed on the basis of simultaneous solution of the convective-diffusion equations of the inclusions in the melt and equations describing melt flow within the ladle, taking account of turbulence. An innovation in the assessment of the mass-transfer coefficient between the alumina particles and the refining flux is the concept of wave flow of a thin liquid-flux film as it interacts with the rough surface of the sintered slag. The removal of alumina particles (10-100 μm) from the metal is assessed. © 2010 Allerton Press, Inc. Source


Samoilovich Y.A.,OAO VNIIMT
Steel in Translation | Year: 2010

Melt fluxes in the liquid core of thin solidifying steel slabs are analyzed, for two different nozzle configurations. The reliability of the analysis is ensured by taking account of turbulence on the basis of a two-parameter Launder-Spalding model and also by the universal numerical finite-element method. © 2010 Allerton Press, Inc. Source

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